A&P question about canon lenses

Discussion in 'Lifestyle' started by 00soul, Jan 8, 2006.

  1. 00soul

    00soul halfsharkalligatorhalfman

    Joined:
    Jul 12, 2001
    Messages:
    28,325
    Likes Received:
    0
    Location:
    the overlook hotel
    how can you tell the difference between the low and middle range (price wise) lenses? i know the top range has a "L" designation. is there a certain "look" to the lense that easily distinguishes them?
     
  2. dtfromep

    dtfromep New Member

    Joined:
    Oct 11, 2003
    Messages:
    1,674
    Likes Received:
    0
    Location:
    Saint Paul, MN
    L lenses have a red ring around them. USM lenses have a yellow/gold 'ULTRASONIC' ring around them. The cheapo lenses just say canon with no rings.
     
  3. 00soul

    00soul halfsharkalligatorhalfman

    Joined:
    Jul 12, 2001
    Messages:
    28,325
    Likes Received:
    0
    Location:
    the overlook hotel

    thanks. what about lenses that have "ultrasonic" but no ring?
     
    Last edited: Jan 8, 2006
  4. dtfromep

    dtfromep New Member

    Joined:
    Oct 11, 2003
    Messages:
    1,674
    Likes Received:
    0
    Location:
    Saint Paul, MN
    No idea on those, haven't heard of them. I was under the impression that USM always had either red or gold rings.
     
  5. 00soul

    00soul halfsharkalligatorhalfman

    Joined:
    Jul 12, 2001
    Messages:
    28,325
    Likes Received:
    0
    Location:
    the overlook hotel

    i saw a few on B&H. they are cheap so i'm willing to bet they arent too swell
     
  6. Tomash

    Tomash Active Member

    Joined:
    Aug 31, 2003
    Messages:
    77,754
    Likes Received:
    0
    Location:
    Houston, TX
    Also, DO (Difrractive Optics - 400mm f/4 DO IS USM, and 100-300mm f/4.5-5.6 DO IS USM have a green ring in place of the red ring of ther L-line of lenses.
     
  7. dtfromep

    dtfromep New Member

    Joined:
    Oct 11, 2003
    Messages:
    1,674
    Likes Received:
    0
    Location:
    Saint Paul, MN
    :bowdown: The rare DO series.
     
  8. SpiderOnTheFloor

    SpiderOnTheFloor New Member

    Joined:
    Oct 2, 2003
    Messages:
    11,348
    Likes Received:
    0
  9. Tomash

    Tomash Active Member

    Joined:
    Aug 31, 2003
    Messages:
    77,754
    Likes Received:
    0
    Location:
    Houston, TX
  10. 00soul

    00soul halfsharkalligatorhalfman

    Joined:
    Jul 12, 2001
    Messages:
    28,325
    Likes Received:
    0
    Location:
    the overlook hotel
    how is the weight/build quality of the USM lenses? when i had a 35mm slr the lenses were hefty in weight like a nice coffee mug. the lower end kit lens i bought is plasticy, light weight and flimsy...
     
  11. dtfromep

    dtfromep New Member

    Joined:
    Oct 11, 2003
    Messages:
    1,674
    Likes Received:
    0
    Location:
    Saint Paul, MN
    USM ones are much heavier/better quality than the basic canon lenses. Can't say for DO or L glass, though.

    I would say that the USM lenses typically weigh at least as much as a coffee mug, yet light enough to still be portable.
     
  12. Tomash

    Tomash Active Member

    Joined:
    Aug 31, 2003
    Messages:
    77,754
    Likes Received:
    0
    Location:
    Houston, TX
    USM is just the focusing mechanism.
     
  13. Tomash

    Tomash Active Member

    Joined:
    Aug 31, 2003
    Messages:
    77,754
    Likes Received:
    0
    Location:
    Houston, TX
    :ugh:
     
  14. dtfromep

    dtfromep New Member

    Joined:
    Oct 11, 2003
    Messages:
    1,674
    Likes Received:
    0
    Location:
    Saint Paul, MN
    What would you classify/call this series of lens (with the gold ring reading "ULTRASONIC"):

    [​IMG] 20-35mm f/3.5-4.5 USM

    28-105
    28-135 IS
    etc, etc
     
  15. Hua

    Hua AZN photographer crew

    Joined:
    May 5, 2000
    Messages:
    2,689
    Likes Received:
    0
    Location:
    Columbus, OH
    usm
     
  16. 00soul

    00soul halfsharkalligatorhalfman

    Joined:
    Jul 12, 2001
    Messages:
    28,325
    Likes Received:
    0
    Location:
    the overlook hotel

    i know, but if they are going to up the quality of the focusing mechanism i'd like to think they'd up the overall quality of material surrounding the lens. this lens i have (regular ass kit lens) is about as ridged as a fortune cookie
     

Share This Page